Parse markdown into an OpenAI chat completion request

crates/zed/src/main.rs

@@ -162,6 +162,7 @@ fn main() {
         terminal_view::init(cx);
         theme_testbench::init(cx);
         copilot::init(http.clone(), node_runtime, cx);
+        ai::init(cx);
 
         cx.spawn(|cx| watch_themes(fs.clone(), cx)).detach();